Here is the full list of all 12 Pirate Pop Plus achievements.
Extremely aggressive (and sarcastic) parrot
Slightly dented spyglass, property of Bubble Pirate
For the sailor who sees no evil
Used treasure map with "X marked the spot"
Worn glasses, left lens is from milk bottle
Cannonball made from solid gold (yeah right!)
Delicately fragile golden bubble, looks expensive
Comical inflatable hook. Small hand grip inside
Old wooden leg, one careful owner
Severely worn and tattered pirate flag
"Property of Dave" embroidered on side
Rusty old key, opens Davy Jones' Locker